Annual report pursuant to Section 13 and 15(d)

12. COMMITMENTS AND CONTINGENCIES (Details Narrative)

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12. COMMITMENTS AND CONTINGENCIES (Details Narrative) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Operating lease expense $ 285,960us-gaap_LeaseAndRentalExpense $ 99,080us-gaap_LeaseAndRentalExpense
Commitment 1    
Purchase commitment 7,200,000us-gaap_ContractualObligation
/ us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis
= canv_Commitment1Member
 
Commitment 2    
Purchase commitment $ 1,800,000us-gaap_ContractualObligation
/ us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis
= canv_Commitment2Member